import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;

@WebServlet("/CookieDemo1")
public class CookieDemo1 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //通过响应对象写出提示信息
        resp.setContentType("text/html;charset= UTF-8");
        PrintWriter pw = resp.getWriter();
        pw.write("欢迎访问本网站，您的最后访问时间为:<br/>");

        //创建Cookie对象，用于记录最后的访问的时间
        Cookie cookie = new Cookie("time", System.currentTimeMillis() + "");

        //设置最大的存活时间,即设置cookie的生命周期
        cookie.setMaxAge(3600);
        //将cookie对象添加到客户端
        resp.addCookie(cookie);
        //获取cookie
        Cookie[] cookies = req.getCookies();
        for(Cookie cookie1 : cookies){
            if("time".equals(cookie1.getName())){
                String value = cookie1.getValue();
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss");
                pw.write(sdf.format(Long.parseLong(value)));
            }
        }

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req,resp);
    }
}
